How much does Cortisol (Venous) cost at Wimpole Street?

£66 — the standard price that applies to everyone. There is no discounted members’ tier at Wimpole Street and nothing to join. Where a venous draw is needed, a phlebotomy fee is shown on the page before you book and is charged once per visit however many tests are taken.

Why must cortisol be tested first thing in the morning?

Cortisol peaks within an hour of waking and falls steadily through the day. Laboratory ranges are based on 8–9am samples, so a value drawn at lunchtime may look falsely low. If you work nights, tell the nurse so the timing can be adjusted to your waking time.

Is a cortisol test a way to check for “adrenal fatigue”?

Adrenal fatigue is not a recognised medical diagnosis, and a normal cortisol does not confirm or refute it. Cortisol testing is used to look for genuine adrenal insufficiency or excess. Persistent tiredness has many possible causes and merits a broader assessment.

How long do adrenal hormone results take?

Serum cortisol is typically reported within a day of reaching the laboratory. ACTH, aldosterone, renin, urine metanephrines and precursor steroids are specialist assays and often take one to two weeks.

Can I book adrenal tests for a child?

Medical services at Wimpole Street are for patients aged 16 and over. Suspected adrenal problems in children are investigated by paediatric endocrinology via an NHS GP referral.

What happens if my cortisol comes back very low?

A low cortisol will be flagged on the laboratory report. Arrange prompt clinical assessment with your GP or a clinician, as untreated adrenal insufficiency can be serious. If you feel faint, are vomiting or cannot keep fluids down, call 999 or NHS 111 without waiting.

📍 Wimpole StreetOpening 1 Oct

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Individual Test

Cortisol (Venous) Blood Test Marylebone

From 1 October 2026 — until then book at South Kensington or St Paul's. South Kensington · St Paul's

20 min appointment

Results: 1 day"

Venous blood

£66

+ £50 phlebotomy fee (per visit)

Price

£66

+ £50 phlebotomy (per visit)

Confidential Results

Secure online portal

Fast Results

1 day"

Professional Service

Experienced phlebotomists

Wimpole Street, Marylebone (opening 1 October 2026)

22 Wimpole Street, Marylebone, London W1G 8GQ

020 7183 0692

wimpolestreet@md.co.uk

Opens 1 October 2026

Opening hours from 1 October 2026

Monday: 9am – 6pm
Tuesday: 9am – 8pm
Wednesday: 9am – 6pm
Thursday: 9am – 8pm
Friday: 8am – 5pm
Saturday: 10am – 4pm
Sunday: Closed

Bond Street — about 6 minutes (Central, Jubilee & Elizabeth lines)
Oxford Circus — about 7 minutes (Central, Bakerloo & Victoria lines)

Wimpole Street, Marylebone

Within the adrenal and cortisol range at Wimpole Street, the Cortisol (Venous) is the test to consider when the question concerns stress hormone test, adrenal gland function and hydrocortisone level. It costs £66, and once the Marylebone clinic opens on 1 October 2026 a nurse or phlebotomist takes the venous blood sample (serum), with the laboratory typically reporting in 1 day. Medical services are for patients aged 16 and over, self-referral with no GP referral needed, and the laboratory report is delivered to your secure portal.

adrenal and cortisol · Wimpole Street

Cortisol (Venous)’s place in adrenal and cortisol testing

Sample: venous blood sample (serum)
Laboratory turnaround: 1 day
Appointment: 20 minutes
Standard price: £66 + £50 phlebotomy per visit

What Cortisol (Venous) measures

Laboratories file the Cortisol (Venous) under stress hormone test, adrenal gland function and hydrocortisone level. The following sections set out how an adrenal and cortisol test of this kind is measured and read.

Adrenal tests measure cortisol — in blood, urine or saliva — together with the pituitary hormone ACTH that drives it, and precursor steroids such as 17-hydroxyprogesterone, 11-deoxycortisol and DHEA that help to characterise adrenal enzyme pathways. Aldosterone and renin address blood pressure and salt balance, while urine metanephrines and catecholamines screen for rare adrenaline-producing tumours. Adrenal cortex antibodies look for an autoimmune cause of underactivity.

Preparing for your Cortisol (Venous)

1Blood cortisol should be taken between 8am and 9am, when the natural peak makes the reference range meaningful; a late-day value is hard to interpret.
2Steroid inhalers, creams and tablets, and some oral contraceptives, alter cortisol; list everything you use.
3For urine metanephrines, avoid caffeine, nicotine and strenuous exercise for 24 hours and follow the collection instructions supplied.
4Aldosterone and renin are affected by posture and many blood pressure medicines — the nurse will advise on timing.

Sample for this test: venous blood sample (serum).

Who considers Cortisol (Venous)

People often consider adrenal testing if they experience profound fatigue, dizziness on standing and salt cravings.
Weight gain around the trunk and face, easy bruising and thin skin can prompt a look for excess cortisol.
High blood pressure that is difficult to control, or a low potassium, may lead to aldosterone and renin being measured.
Episodes of palpitations, sweating and headaches occurring together sometimes warrant a metanephrine screen.
Those on long-term steroid medication may check adrenal recovery after stopping.

Understanding your Cortisol (Venous) results

A low morning cortisol can indicate adrenal insufficiency and normally leads to a stimulation test in a specialist setting; a high value may reflect stress, illness or oestrogen-containing medication as often as true excess. Raised aldosterone with suppressed renin can indicate primary aldosteronism, a treatable cause of high blood pressure. Metanephrine results are read against age-specific ranges and mildly raised values are frequently repeated because of dietary and medication interference.

Adrenal hormones are governed by time of day, stress and medication, so a single result is a starting point for interpretation rather than a conclusion.

Related areas of testing at Wimpole Street: pituitary and growth hormones, kidney function and electrolytes, male hormones, female hormones and fertility.

Pricing

Cortisol (Venous)

Individual test

£66

Phlebotomy Fee

Blood draw by qualified phlebotomist (per visit)

£50

Total

£116

Payment is collected at the clinic. The phlebotomy fee is charged once per visit, regardless of the number of tests booked.

How it works at Wimpole Street

From booking the Cortisol (Venous) to reading your result

1
Choose your test
Select the Cortisol (Venous) and any others you want run from the same visit. Until 1 October 2026 the identical test can be booked at South Kensington or St Paul’s.
2
Nurse-led sample
From 1 October 2026 the venous blood sample (serum) is taken at 22 Wimpole Street, Marylebone by our nursing team, led by Precious Agbonmamwen, Registered Adult Nurse (NMC 20H1641E). Identity is checked and any preparation questions answered first.
3
UKAS-accredited laboratory
The sample travels to a UKAS-accredited partner laboratory, whose methods and reference ranges match those used across the NHS and private sectors.
4
Laboratory report to your secure portal
The laboratory report is released to your secure portal — typically from 24 hours; the laboratory quotes 1 day for this test. It shows each value against the reference range and flags anything outside it; discuss the report with your GP or a clinician.

Marylebone, W1

Why test at Wimpole Street

Wimpole Street Medical & Dental opens at 22 Wimpole Street on 1 October 2026. Medical services are for patients aged 16 and over; registration with the CQC is in progress ahead of opening.

Wimpole Street, Marylebone (opening 1 October 2026)

22 Wimpole Street, Marylebone, London W1G 8GQ

020 7183 0692

wimpolestreet@md.co.uk

Opens 1 October 2026

Bond Street — about 6 minutes (Central, Jubilee & Elizabeth lines)
Oxford Circus — about 7 minutes (Central, Bakerloo & Victoria lines)

Analysis is carried out by a UKAS-accredited partner laboratory, so methods and reference ranges match those used across the NHS.
The same catalogue already runs at South Kensington and St Paul’s, so you can test now and move your records to Marylebone later.
Self-referral: you choose the test and book directly — no GP referral is needed, and the laboratory report is yours to take to your GP or a clinician.

More adrenal and cortisol tests

Other tests often considered alongside Cortisol (Venous)

All blood tests at Wimpole Street

Frequently Asked Questions

A venous blood sample (serum). A nurse or phlebotomist collects it at 22 Wimpole Street, Marylebone from 1 October 2026; the appointment allows time for identity checks and any preparation questions. The laboratory quotes 1 day for this test.

Ready to Book Your Test?

Wimpole Street opens 1 October 2026. Register your interest for the Marylebone diary, or book the same test now at South Kensington or St Paul's.

Important information about the Cortisol (Venous) at Wimpole Street

Medical services at Wimpole Street Medical & Dental are for patients aged 16 and over.
This is a self-referral service: you choose the test and book directly — no GP referral is needed.
Nurse-led by Precious Agbonmamwen, Registered Adult Nurse (NMC 20H1641E), who oversees sample-taking standards, infection control and the patient pathway. The nursing team does not interpret results.
A laboratory result is not a diagnosis and this page is not a substitute for medical advice. We do not provide clinical interpretation of results — please discuss your report with your GP or a clinician, particularly if a value is flagged or you have symptoms.
CQC registration for Wimpole Street is in progress ahead of the opening on 1 October 2026; our South Kensington and St Paul’s clinics are CQC registered.
Your results are held on a secure portal and treated as strictly confidential, except where disclosure is required by law.
If you are seriously unwell, call 999. For urgent advice that is not an emergency, call NHS 111.